Alert archive / Tennessee / Mesoscale Discussions in 2004

Mesoscale Discussion 174

March 5, 20045 counties in Mississippi; 12 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Mar 5, 2004, 12:57 AM CST for 5 counties in Mississippi; 12 counties in Tennessee. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Mar 5, 2004, 12:57 AM CST (06:57 UTC)
Expired: Mar 5, 2004, 2:00 AM CST
In force: 63 min
Issued by: the Storm Prediction Center

Counties Benton County, MS, DeSoto County, MS, Marshall County, MS, Tate County, MS, Tippah County, MS, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 7.0 hours before the alert went out and 103 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 54 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 798 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 295 m²/s²
0-3 km storm-relative helicity: 489 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 4, 6:15 PM CST	Tornado Watch	SPC	Bolivar, Carroll, Coahoma, DeSoto, Holmes, Humphreys and 12 more	5 hr
Mar 4, 9:24 PM CST	Mesoscale Discussion	SPC	Bolivar, Coahoma, DeSoto, Quitman, Tate, Tunica	66 min
Mar 5, 4:50 PM CST	Mesoscale Discussion	SPC	Adams, Amite, Attala, Calhoun, Carroll, Chickasaw and 40 more	115 min
Mar 5, 5:40 PM CST	Tornado Watch	SPC	Adams, Attala, Chickasaw, Choctaw, Claiborne, Clay and 29 more	5 hr

Nearby

Mesoscale Discussions in Tennessee, 2004 Mesoscale Discussions in Mississippi, 2004 Every mesoscale discussion in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.